串口2接收数据死机 发送没问题
//GPIO¶Ë¿ÚÉèÖÃGPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE); //ʹÄÜUSART2ʱÖÓ
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE); //ʹÄÜGPIOAʱÖÓ
GPIO_PinAFConfig(GPIOA, GPIO_PinSource2, GPIO_AF_1);//¸´ÓÃÍÆÍìÊä³ö
GPIO_PinAFConfig(GPIOA, GPIO_PinSource3, GPIO_AF_1);//¸´ÓÃÍÆÍìÊä³ö
//USART1_TX GPIOA.2
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; //¸´ÓÃÍÆÍìÊä³ö
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_Level_3; // I/OÊä³öƵÂÊ 50 MHz
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;//PA.2
GPIO_Init(GPIOA, &GPIO_InitStructure);
//USART1_RX GPIOA.3
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3; //PA.3
GPIO_Init(GPIOA, &GPIO_InitStructure);
//Usart2 NVIC ÅäÖÃ
NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority=2 ;//ÓÅÏȼ¶3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQͨµÀʹÄÜ
NVIC_Init(&NVIC_InitStructure); //¸ù¾ÝÖ¸¶¨µÄ²ÎÊý³õʼ»¯VIC¼Ä´æÆ÷
//USART ³õʼ»¯ÉèÖÃ
USART_InitStructure.USART_BaudRate = bound2;//´®¿Ú²¨ÌØÂÊ
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//×Ö³¤Îª8λÊý¾Ý¸ñʽ
USART_InitStructure.USART_StopBits = USART_StopBits_1;//Ò»¸öֹͣλ
USART_InitStructure.USART_Parity = USART_Parity_No;//ÎÞÆæżУÑéλ
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//ÎÞÓ²¼þÊý¾ÝÁ÷¿ØÖÆ
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //ÊÕ·¢Ä£Ê½
USART_Init(USART2, &USART_InitStructure); //³õʼ»¯´®¿Ú2
USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);//¿ªÆô´®¿Ú2½ÓÊÜÖжÏ
USART_Cmd(USART2, ENABLE);
u8 aa;
void USART2_IRQHandler(void) //´®¿Ú1ÖжϷþÎñ³ÌÐò
{
if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET)//½ÓÊÕÖжÏ(½ÓÊÕµ½µÄÊý¾Ý±ØÐëÊÇ0x0d 0x0a½áβ)
{
aa =USART_ReceiveData(USART2); //¶ÁÈ¡½ÓÊÕµ½µÄÊý¾Ý
}
}
本帖最后由 wenyangzeng 于 2018-10-8 15:13 编辑
楼主怎么没有请中断标志位？
USART_ClearITPendingBit(USART2,USART_IT_RXNE);
页:
[1]